CN109523956A - Pixel circuit and its driving method, display device - Google Patents

Pixel circuit and its driving method, display device Download PDF

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Publication number
CN109523956A
CN109523956A CN201710840124.4A CN201710840124A CN109523956A CN 109523956 A CN109523956 A CN 109523956A CN 201710840124 A CN201710840124 A CN 201710840124A CN 109523956 A CN109523956 A CN 109523956A
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CN
China
Prior art keywords
circuit
signal
transistor
reset
driving
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Granted
Application number
CN201710840124.4A
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Chinese (zh)
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CN109523956B (en
Inventor
李祥远
高玟虎
姜尚勋
谭文
高永益
董婉俐
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BOE Technology Group Co Ltd
Chengdu BOE Optoelectronics Technology Co Ltd
Original Assignee
BOE Technology Group Co Ltd
Chengdu BOE Optoelectronics Technology Co Ltd
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Application filed by BOE Technology Group Co Ltd, Chengdu BOE Optoelectronics Technology Co Ltd filed Critical BOE Technology Group Co Ltd
Priority to CN201710840124.4A priority Critical patent/CN109523956B/en
Priority to US16/619,189 priority patent/US10991303B2/en
Priority to PCT/CN2018/104361 priority patent/WO2019052394A1/en
Publication of CN109523956A publication Critical patent/CN109523956A/en
Application granted granted Critical
Publication of CN109523956B publication Critical patent/CN109523956B/en
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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
    • G09G3/3241—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element the current through the light-emitting element being set using a data current provided by the data driver, e.g. by using a two-transistor current mirror
    • G09G3/325—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element the current through the light-emitting element being set using a data current provided by the data driver, e.g. by using a two-transistor current mirror the data current flowing through the driving transistor during a setting phase, e.g. by using a switch for connecting the driving transistor to the data driver
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3266—Details of drivers for scan electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3275—Details of drivers for data electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0819—Several active elements per pixel in active matrix panels used for counteracting undesired variations, e.g. feedback or autozeroing
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
    • G09G2300/0861—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0243—Details of the generation of driving signals
    • G09G2310/0251—Precharge or discharge of pixel before applying new pixel voltage
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3275—Details of drivers for data electrodes
    • G09G3/3291—Details of drivers for data electrodes in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Control Of El Displays (AREA)

Abstract

A kind of pixel circuit and its driving method, display device.The pixel circuit includes switching circuit, driving circuit, compensation circuit, reset circuit and light-emitting component.The driving circuit includes control terminal, first end and second end, and is configured to the driving current for driving the light-emitting component luminous that control flows through the first end and the second end；The switching circuit is configured to that data-signal is written to the control terminal of the driving circuit in response to scanning signal；The compensation circuit is configured to the data-signal of storage write-in and is electrically connected the control terminal of the driving circuit and second end in response to the scanning signal；The reset circuit is configured to that resetting voltage is applied to the compensation circuit in response to reset signal and is electrically connected the control terminal of the driving circuit and first end.The pixel circuit can compensate the threshold voltage of driving circuit, but also can reduce Leakage Current, so as to improve the display effect for the display device for using the pixel circuit.

Description

Pixel circuit and its driving method, display device
Technical field
The embodiment of the present disclosure is related to a kind of pixel circuit and its driving method, display device
Background technique
Organic Light Emitting Diode (Organic Light Emitting Diode, OLED) display device is due to visual angle It is wide, contrast is high, fast response time and compared to the higher light emission luminance of inorganic light emitting displays part, lower driving voltage Etc. advantages and gradually get more and more people's extensive concerning.Due to These characteristics, Organic Light Emitting Diode (OLED) can be adapted for hand The device having a display function such as machine, display, laptop, digital camera, instrument and meter.
Whether the pixel circuit in OLED display generally uses matrix driving mode, draw according in each pixel unit Enter switching component and is divided into active matrix (Active Matrix, AM) driving and passive matrix (Passive Matrix, PM) drive It is dynamic.Although PMOLED simple process, cost is relatively low, because of the disadvantages of there are cross-talk, high power consumption, low service life, it is not able to satisfy The demand that high Resolution and Large Size is shown.In contrast, AMOLED is integrated with one group in the pixel circuit of each pixel Thin film transistor (TFT) and storage capacitance are realized by the drive control to thin film transistor (TFT) and storage capacitance to the electricity for flowing through OLED The control of stream, so that OLED be made to shine as needed.Compared to PMOLED, driving current needed for AMOLED is small, the low in energy consumption, service life more Long, the large scale that can satisfy the more gray scales of high-resolution shows demand.Meanwhile AMOLED is in visible angle, the reduction of color, function Consumption and response time etc. have apparent advantage, are suitable for high information content, high-resolution display device.
Summary of the invention
A disclosure at least embodiment provides a kind of pixel circuit, including switching circuit, driving circuit, compensation circuit, multiple Position circuit and light-emitting component.The driving circuit includes control terminal, first end and second end, and is configured to control and flows through described the The driving current for driving the light-emitting component luminous of one end and the second end；The switching circuit be configured in response to The control terminal of the driving circuit is written in data-signal by scanning signal；The compensation circuit is configured to the number of storage write-in It is believed that number and the control terminal of the driving circuit and second end are electrically connected in response to the scanning signal；The reset circuit is matched It is set in response to reset signal and resetting voltage to be applied to the compensation circuit and by the control terminal of the driving circuit and first End electrical connection.
For example, one embodiment of the disclosure provide pixel circuit further include: the first emission control circuit, be configured in response to First voltage is applied to the second end and the compensation circuit of the driving circuit by the first LED control signal.
For example, one embodiment of the disclosure provide pixel circuit further include: the second emission control circuit, be configured in response to The driving current is applied to the light-emitting component by the second LED control signal.Second LED control signal is different from institute State the first LED control signal.
For example, one embodiment of the disclosure provide pixel circuit in, the reset circuit include the first reset circuit and Second reset circuit, first reset circuit is in response to the reset signal by the control terminal and first end of the driving circuit The resetting voltage is applied to the compensation circuit in response to the reset signal by electrical connection, second reset circuit.
For example, in the pixel circuit that one embodiment of the disclosure provides, second reset circuit and the driving circuit Control terminal and the compensation circuit connection, the resetting voltage is applied to control terminal and the institute of the driving circuit State compensation circuit.
For example, second reset circuit shines with described second in the pixel circuit that one embodiment of the disclosure provides Control circuit and light-emitting component connection, are applied to the light-emitting component for the resetting voltage, and pass through described the The resetting voltage is applied to the compensation circuit by one reset circuit.
For example, the driving circuit includes the first transistor in the pixel circuit that one embodiment of the disclosure provides.It is described The grid of the first transistor is connected as the control terminal of the driving circuit with first node, the first pole of the first transistor First end as the driving circuit is connected with third node, and the second pole of the first transistor is as the driving circuit Second end connected with second node.
For example, the switching circuit includes second transistor in the pixel circuit that one embodiment of the disclosure provides.It is described The gate configuration of second transistor is to connect with scanning signal end to receive the scanning signal, the first of the second transistor Pole is configured to be connected with data signal end to receive the data-signal, the second pole of the second transistor and the third section Point connection.
For example, the compensation circuit includes third transistor and deposits in the pixel circuit that one embodiment of the disclosure provides Storage is held.The gate configuration of the third transistor is to be connected with scanning signal end to receive the scanning signal, the third First pole of transistor is connected with the second node, the second pole of the second transistor and the first pole of the storage capacitance Connection, the second pole of the storage capacitance is configured to connect with first voltage end to receive first voltage.
For example, first emission control circuit includes the 4th brilliant in the pixel circuit that one embodiment of the disclosure provides Body pipe.The gate configuration of 4th transistor is to be connected with the first light emitting control end to receive the first light emitting control letter Number, the first pole of the 4th transistor is configured to be connected with first voltage end to receive first voltage, the 4th transistor The second pole connected with the second node.
For example, second emission control circuit includes the 5th brilliant in the pixel circuit that one embodiment of the disclosure provides Body pipe.The gate configuration of 5th transistor is to be connected with the second light emitting control end to receive the second light emitting control letter Number, the first pole of the 5th transistor is connected with the third node, the second pole of the 5th transistor and it is described shine First pole of element connects, and the second pole of the light-emitting component is configured to connect with second voltage end to receive second voltage.
For example, first reset circuit includes the 6th transistor in the pixel circuit that one embodiment of the disclosure provides. The gate configuration of 6th transistor is to be connected with reseting controling end to receive the reset signal, the 6th transistor First pole is connected with the first node, and the second pole of the 6th transistor is connected with the third node.
For example, second reset circuit includes the 7th transistor in the pixel circuit that one embodiment of the disclosure provides. The gate configuration of 7th transistor is to be connected with reseting controling end to receive the reset signal, the 7th transistor First pole is connected with the first node, and the second pole of the 7th transistor is configured to connect with resetting voltage end to receive State resetting voltage.
For example, second reset circuit includes the 7th transistor in the pixel circuit that one embodiment of the disclosure provides. The gate configuration of 7th transistor is to be connected with reseting controling end to receive the reset signal, the 7th transistor First pole is connected with the first pole of the light-emitting component, and the second pole of the 7th transistor is configured to connect with resetting voltage end To receive the resetting voltage.
For example, in the pixel circuit that one embodiment of the disclosure provides, second LED control signal and the reset Signal is at least while open signal.
A disclosure at least embodiment also provides a kind of display device, comprising: more in multiple pixel units of array distribution Scan signal line, a plurality of data signal line and a plurality of reset control line.Each pixel unit includes the implementation of the disclosure Pixel circuit described in example；The scan signal line of every a line is connected with the switching circuit in the pixel circuit of current row with compensation circuit To provide the scanning signal；The data signal line of each column connects described to provide with the switching circuit in Ben Lie pixel circuit Data-signal；The reset control line of every a line is connected with the reset circuit in current row pixel circuit to provide the reset signal.
For example, the display device that one embodiment of the disclosure provides further includes a plurality of light emitting control line.The pixel circuit is also Include: the first emission control circuit, is configured to that first voltage is applied to the driving electricity in response to the first LED control signal The second end on road and the compensation circuit；Second emission control circuit is configured to institute in response to the second LED control signal It states driving current and is applied to the light-emitting component, second LED control signal is different from first LED control signal. The first emission control circuit in the pixel circuit of Nth row is connected with the light emitting control line of Nth row；In the pixel circuit of Nth row The second emission control circuit and N+1 row light emitting control line connection；The first light emitting control in the pixel circuit of N+1 row The connection of the light emitting control line of circuit and N+1 row；N is the integer greater than zero.
A disclosure at least embodiment also provides a kind of driving method of pixel circuit, comprising: reseting stage, data write-in With compensated stage and light emitting phase.In reseting stage, the reset signal is inputted, opens the reset circuit, to the compensation Circuit and the driving circuit are resetted；In data write-in and compensated stage, the scanning signal and data letter are inputted Number, the switching circuit, the driving circuit and the compensation circuit are opened, the data-signal is written the switching circuit The driving circuit, the compensation circuit compensate the driving circuit；And in light emitting phase, the driving circuit is driven The light-emitting component is moved so that it shines.
A disclosure at least embodiment also provides a kind of driving method of pixel circuit, comprising: reseting stage, data write-in With compensated stage, charging and holding stage, light emitting phase.In reseting stage, inputs the reset signal and described second and shine Signal is controlled, first reset circuit, second reset circuit and second emission control circuit are opened, to the benefit Circuit, the driving circuit and the light-emitting component is repaid to be resetted；In data write-in and compensated stage, the scanning letter is inputted Number and the data-signal, open the switching circuit, the driving circuit and the compensation circuit, the switching circuit is by institute It states data-signal and the driving circuit is written, the compensation circuit compensates the driving circuit；Charging and keeping rank Section inputs first LED control signal, opens first emission control circuit and the driving circuit, first hair The first voltage is applied to the driving circuit and keeps the voltage of the driving circuit control terminal by light control circuit；And In light emitting phase, first LED control signal and second LED control signal are inputted, opens the described first luminous control Circuit, the second emission control circuit and the driving circuit processed, second emission control circuit apply the driving current To the light-emitting component so that it shines.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the embodiment of the present disclosure, the attached drawing to embodiment is simply situated between below It continues, it should be apparent that, the accompanying drawings in the following description merely relates to some embodiments of the present disclosure, rather than the limitation to the disclosure.
Figure 1A is a kind of schematic diagram of 2T1C pixel circuit；Figure 1B is the schematic diagram of another kind 2T1C pixel circuit；
Fig. 2 is a kind of schematic block diagram for pixel circuit that one embodiment of the disclosure provides；
Fig. 3 is a kind of exemplary circuit diagram of specific implementation of pixel circuit shown in Fig. 2；
Fig. 4 is a kind of schematic block diagram for pixel circuit that another embodiment of the disclosure provides；
Fig. 5 is a kind of exemplary circuit diagram of specific implementation of pixel circuit shown in Fig. 4；
Fig. 6 is the timing diagram for the driving method that one embodiment of the disclosure provides；
Fig. 7 to Figure 10 is respectively the circuit diagram that pixel circuit shown in Fig. 5 corresponds to four-stage in Fig. 6；With And
Figure 11 is a kind of schematic diagram for display device that one embodiment of the disclosure provides.
Specific embodiment
To keep the purposes, technical schemes and advantages of the embodiment of the present disclosure clearer, below in conjunction with the embodiment of the present disclosure Attached drawing, the technical solution of the embodiment of the present disclosure is clearly and completely described.Obviously, described embodiment is this public affairs The a part of the embodiment opened, instead of all the embodiments.Based on described embodiment of the disclosure, ordinary skill Personnel's every other embodiment obtained under the premise of being not necessarily to creative work, belongs to the range of disclosure protection.
Unless otherwise defined, the technical term or scientific term that the disclosure uses should be tool in disclosure fields The ordinary meaning for thering is the personage of general technical ability to be understood." first ", " second " used in the disclosure and similar word are simultaneously Any sequence, quantity or importance are not indicated, and are used only to distinguish different component parts.Equally, "one", " one " or The similar word such as person's "the" does not indicate that quantity limits yet, but indicates that there are at least one." comprising " or "comprising" etc. are similar Word mean to occur element or object before the word cover the element for appearing in the word presented hereinafter or object and its It is equivalent, and it is not excluded for other elements or object.The similar word such as " connection " or " connected " be not limited to physics or The connection of person's machinery, but may include electrical connection, it is either direct or indirect."upper", "lower", " left side ", " right side " etc. is only used for indicating relative positional relationship, after the absolute position for being described object changes, then the relative positional relationship May correspondingly it change.
Basic pixel circuit used in AMOLED display device is usually 2T1C pixel circuit, that is, utilizes two TFT (Thin-film transistor, thin film transistor (TFT)) and a storage capacitance Cs realize the luminous basic training of driving OLED Energy.Figure 1A and Figure 1B is respectively to show the schematic diagram of two kinds of 2T1C pixel circuits.
As shown in Figure 1A, a kind of 2T1C pixel circuit includes switching transistor T0, driving transistor N0 and storage capacitance Cs.For example, the grid of switching transistor T0 connects scan line to receive scanning signal Scan1, such as source electrode is connected to data For line to receive data-signal Vdata, drain electrode is connected to the grid of driving transistor N0；The source electrode of driving transistor N0 is connected to the For one voltage end to receive first voltage Vdd (high voltage), drain electrode is connected to the positive terminal of OLED；One end of storage capacitance Cs connects To switching transistor T0 drain electrode and drive transistor N0 grid, the other end be connected to driving transistor N0 source electrode and First voltage end；The negative pole end of OLED is connected to second voltage end to receive second voltage Vss (low-voltage, such as ground connection electricity Pressure).The driving method of the 2T1C pixel circuit is to control the light and shade (grayscale) of pixel via two TFT and storage capacitance Cs System.When applying scanning signal Scan1 by scan line to open switching transistor T0, data drive circuit is sent by data line The data-signal Vdata entered will charge to storage capacitance Cs via switching transistor T0, thus be stored in data-signal Vdata In storage capacitance Cs, and the conducting degree of the data-signal Vdata control driving transistor N0 of this storage, thus drive is flowed through in control The grayscale that the size of current that transistor is moved to drive OLED luminous, i.e. this electric current determine the pixel light emission.Shown in figure 1A In 2T1C pixel circuit, switching transistor T0 is N-type transistor and drives transistor N0 to be P-type transistor.
As shown in Figure 1B, another 2T1C pixel circuit also includes switching transistor T0, driving transistor N0 and storage Capacitor Cs, but its connection type is slightly changed, and driving transistor N0 is N-type transistor.The pixel circuit of Figure 1B relative to The variation place of Figure 1A includes: that the positive terminal of OLED is connected to first voltage end to receive first voltage Vdd (high voltage), and bears It is extremely connected to the drain electrode of driving transistor N0, the source electrode of driving transistor N0 is connected to second voltage end to receive second voltage Vss (low-voltage, such as ground voltage).One end of storage capacitance Cs is connected to drain electrode and the driving crystal of switching transistor T0 The grid of pipe N0, the other end are connected to source electrode and the second voltage end of driving transistor N0.The work of the 2T1C pixel circuit Mode is substantially essentially identical with pixel circuit shown in figure 1A, and which is not described herein again.
It, can also be in addition, switching transistor T0 is not limited to N-type transistor for pixel circuit shown in Figure 1A and Figure 1B For P-type transistor, the polarity for thus controlling the scanning signal Scan1 of its on or off correspondingly change.
OLED display generally includes multiple pixel units by array arrangement, and each pixel unit for example may include Above-mentioned pixel circuit.In OLED display, the threshold voltage of the driving transistor in each pixel circuit is due to preparing work There may be differences for skill, and due to the influence of such as temperature change, drive the threshold voltage of transistor that may generate drift Phenomenon.Therefore, the difference of the threshold voltage of each driving transistor, which may result in, shows bad (such as display is uneven), institute Just to need to compensate threshold voltage.Simultaneously when being in OFF state, due to the presence of Leakage Current, it is also possible to will lead to aobvious Show bad.
Therefore, industry also provides other pictures with compensation function on the basis of the basic pixel circuit of above-mentioned 2T1C Plain circuit, compensation function can realize that the pixel with compensation function is electric by voltage compensation, current compensation or mixed compensation Road can be for example 4T1C or 4T2C etc., and I will not elaborate.
A disclosure at least embodiment provides a kind of pixel circuit.The pixel circuit includes switching circuit, driving circuit, benefit Repay circuit, reset circuit and light-emitting component.Driving circuit includes control terminal, first end and second end, and is configured to control and flows through The driving current for driving light-emitting component luminous of first end and second end；Switching circuit is configured to will in response to scanning signal The control terminal of data-signal write driver circuit；Compensation circuit is configured to the data-signal of storage write-in and in response to scanning signal The control terminal of driving circuit and second end are electrically connected；Reset circuit is configured to be applied to resetting voltage in response to reset signal Compensation circuit and the control terminal of driving circuit and first end are electrically connected.A disclosure at least embodiment is also provided corresponding to above-mentioned The driving method and display device of pixel circuit.
The pixel circuit and its driving method, display device that the embodiment of the present disclosure provides, can be to the threshold value of driving circuit Voltage compensates.Simultaneously because there are two opposite polarity leakage roads each other for the control terminal tool of the driving circuit in pixel circuit Diameter, Leakage Current may be implemented to mutually compensate, and so as to reduce Leakage Current when OFF state, improve display effect.
It is illustrated below by several embodiments.
Embodiment one
The present embodiment provides a kind of pixel circuits 10, and the pixel circuit 10 is for example for the sub-pixel of OLED display. As shown in Fig. 2, pixel circuit 10 includes driving circuit 100, switching circuit 200, compensation circuit 300, reset circuit 600 and shines Element 700.
For example, driving circuit 100 includes first end 110, second end 120 and control terminal 130, it is configured to control and flows through the The driving current for driving light-emitting component 700 luminous of one end 110 and second end 120.For example, in light emitting phase, driving electricity Road 100 can be luminous to drive light-emitting component 700 to carry out to the offer of light-emitting component 700 driving current, and can according to need " gray scale " shines.For example, light-emitting component 700 can use OLED, embodiment of the disclosure includes but is not limited to this.
For example, switching circuit 200 is configured to data-signal Vdata write driver circuit in response to scanning signal Scan 100 control terminal 130.For example, opened in data write-in and compensated stage, switching circuit 200 in response to scanning signal Scan, Thus by the control terminal 130 of data-signal Vdata write driver circuit 100, and be stored in compensation circuit 300, to shine The luminous driving current of driving light-emitting component 700 is generated according to the data-signal Vdata when stage.
For example, compensation circuit 300 is configured to the data-signal Vdata of storage write-in, and will in response to scanning signal Scan The control terminal 130 and second end 120 of driving circuit 100 are electrically connected.For example, in situation of the compensation circuit 300 including storage capacitance Under, in data write-in and compensated stage, compensation circuit can be opened in response to scanning signal Scan, so as to switch electricity The data-signal Vdata that road 200 is written is stored in storage capacitance.For example, simultaneously in data write-in and compensated stage, compensation electricity The control terminal 130 of driving circuit 100 and second end 120 can be electrically connected by road 300, thus make the threshold voltage of driving circuit Relevant information also respectively, may be stored in storage capacitance, thus light emitting phase can use storage include data-signal and The voltage of threshold voltage controls driving circuit, so that driving circuit can be compensated.
For example, reset circuit 600 is configured to that resetting voltage Vinit is applied to compensation circuit in response to reset signal RST 300, and the control terminal of driving circuit 100 130 and first end 110 are electrically connected.For example, reset circuit 600 can in reseting stage To be opened in response to reset signal RST, so as to which resetting voltage Vinit is applied to compensation circuit 300 to carry out to it Reset operation.For example, in other examples, reset circuit 600, can be with when carrying out resetting operation to compensation circuit 300 Light-emitting component 700 is resetted simultaneously.
Pixel circuit 10 provided in this embodiment can compensate the threshold voltage inside driving circuit 100, so that The driving current of driving light-emitting component 700 is not influenced by the threshold voltage, uses the aobvious of the pixel circuit so as to improve The display effect of showing device and the service life for extending light-emitting component 700.Meanwhile compensation circuit 300 is configured to make to drive The control terminal 130 and second end 120 of circuit 100 are electrically connected, and reset circuit 600 is configured to that the control of driving circuit 100 can be made End 130 and first end 110 are electrically connected；In this way, the control terminal 130 of driving circuit 100 can be made to have, and there are two each other Opposite polarity leakage path, the two Leakage Currents may be implemented to mutually compensate, so as to reduce leakage electricity when OFF state Stream improves display effect.
For example, as shown in Fig. 2, pixel circuit 10 can also include the first hair at least one example of the present embodiment Light control circuit 400 is configured to that first voltage Vdd is applied to driving circuit in response to the first LED control signal EM1 100 second end 120 and compensation circuit 300.For example, first voltage Vdd can be driving voltage, such as high voltage.
For example, the first emission control circuit 400 is opened in response to the first LED control signal EM1 in light emitting phase, from And first voltage Vdd can be applied to the second end 120 of driving circuit 100, when driving circuit 100 is connected, it is readily appreciated that, The current potential of its first end 110 is also Vdd.Then, this first voltage Vdd is applied to light-emitting component 700 to mention by driving circuit 100 For driving voltage, so that light-emitting component be driven to shine.In another example in some embodiments, charge and kept for the stage (such as Before light emitting phase), the first emission control circuit 400 can also be opened in response to the first LED control signal EM1, so as to Before light emitting phase, the first end 110 of driving circuit 100 is first charged into first voltage Vdd.
For example, as shown in Fig. 2, pixel circuit 10 can also include the second hair at least one example of the present embodiment Light control circuit 500 is configured to that driving current is applied to light-emitting component in response to the second LED control signal EM2 700。
For example, the second emission control circuit 500 is opened in response to the second LED control signal EM2 in light emitting phase, from And driving current can be applied to light-emitting component 700 by the second emission control circuit 500 by driving circuit 100 so that it is sent out Light；And in the non-luminescent stage, the second emission control circuit 500 ends in response to the second LED control signal EM2, to avoid Light-emitting component 700 shines, and can provide the contrast of corresponding display device.In another example in some instances, resetting rank Section, the second emission control circuit 500 can also be opened in response to the second LED control signal EM2, be resetted so as to combine Circuit 600 is to carry out reset operation to light-emitting component 700.
For example, the second LED control signal EM2 is different from the first LED control signal EM1, such as it both is connected to difference Signal output end.For example it can individually make the second LED control signal EM2 open signal in reseting stage as described above, and In light emitting phase, the first LED control signal EM1 and the second LED control signal EM2 can be made while being open signal.
It should be noted that the luminous control of the first LED control signal EM1 and second in embodiment of the disclosure Signal EM2 processed is to distinguish two different LED control signals of timing.For example, in a display device, when pixel electricity When road 10 is arranged in array, the first LED control signal EM1 can be the first light emitting control in control current row pixel circuit 10 The control signal of circuit 400, meanwhile, the first LED control signal EM1 also control in lastrow pixel circuit 10 second shine Control circuit 500；Likewise, the second LED control signal EM2 is the second light emitting control electricity controlled in current row pixel circuit 10 The control signal on road 500, meanwhile, the second LED control signal EM2 also controls the first luminous control in next line pixel circuit 10 Circuit 400 processed.
For example, as shown in Fig. 2, reset circuit 600 may include the first reset circuit in an example of the present embodiment 610 and second reset circuit 620.First reset circuit 610 is in response to reset signal RST by the control terminal 130 of driving circuit 100 It is electrically connected with first end 110, resetting voltage Vinit is applied to compensation electricity in response to reset signal RST by the second reset circuit 620 Road 300.
For example, as shown in Fig. 2, in a specific example, the control terminal of the second reset circuit 620 and driving circuit 100 130 and compensation circuit 300 connect, by resetting voltage Vinit be applied to driving circuit 100 control terminal 130 and compensation Circuit 300.
For example, pixel circuit 10 shown in Fig. 2 can be implemented as image element circuit structure shown in Fig. 3.Such as Fig. 3 institute Show, the pixel circuit 10 include: first to the 7th transistor T1, T2, T3, T4, T5, T6, T7 and including storage capacitance Cs and Light-emitting component LE.For example, the first transistor T1 is used as driving transistor, other second to the 7th transistors are used as switching Transistor.For example, light-emitting component LE can use OLED, embodiment of the disclosure includes but is not limited to this, following embodiment It is illustrated, repeats no more by taking OLED as an example.The OLED can be various types, such as top emitting, bottom emitting etc., Ke Yifa Feux rouges, green light, blue light or white light etc., embodiment of the disclosure to this with no restriction.
For example, as shown in figure 3, in more detail, driving circuit 100 can be implemented as the first transistor T1.The first transistor The grid of T1 is connected as the control terminal 130 of driving circuit 100 with first node N1, and the first pole of the first transistor T1 is as drive The first end 110 of dynamic circuit 100 is connected with third node N3, the second pole of the first transistor T1 as driving circuit 100 the Two ends 120 are connected with second node N2.
Switching circuit 200 can be implemented as second transistor T2.The gate configuration of second transistor T2 is and scanning signal To receive scanning signal Scan, the first pole of second transistor T2 is configured to connect with data signal end to receive data for end connection The second pole of signal Vdata, second transistor T2 are connect with third node N3.
Compensation circuit 300 can be implemented as including third transistor T3 and storage capacitance Cs.The grid of third transistor T3 It is configured to connect with scanning signal end to receive scanning signal Scan, the first pole of third transistor T3 and second node N2 connect It connects, the second pole of third transistor T3 is connected with the first pole of storage capacitance Cs, and the second pole of storage capacitance Cs is configured to and One voltage end is connected to receive first voltage Vdd.
First emission control circuit 400 can be implemented as the 4th transistor T4.The gate configuration of 4th transistor T4 be and First light emitting control end is connected to receive the first LED control signal EM1, and the first pole of the 4th transistor T4 is configured to and first Voltage end is connected to receive first voltage Vdd, and the second pole of the 4th transistor T4 is connected with second node N2.
Second emission control circuit 500 can be implemented as the 5th transistor T5.The gate configuration of 5th transistor T5 be and Second light emitting control end is connected to receive the first pole and the third node N3 of the second LED control signal EM2, the 5th transistor T5 Connection, the second pole of the 5th transistor T5 connect with the positive terminal of light-emitting component LE, the negative pole end of light-emitting component LE be configured to Second voltage end is connected to receive second voltage Vss.Such as second voltage end can be grounded, i.e. Vss can be 0V.
First reset circuit 610 can be implemented as the 6th transistor T6.The gate configuration of 6th transistor T6 is and resets Control terminal is connected to receive reset signal RST, and the first pole of the 6th transistor T6 is connected with first node N1, the 6th transistor T6 The second pole connected with third node N3.
Second reset circuit 620 can be implemented as the 7th transistor T7.The gate configuration of 7th transistor T7 is and resets Control terminal is connected to receive reset signal RST, and the first pole of the 7th transistor T7 is connected with first node N1, the 7th transistor T7 The second pole be configured to be connected with resetting voltage end to receive resetting voltage Vinit.For example, resetting voltage Vinit can be 0V (or other low level signals etc.).
Pixel circuit as shown in Figure 3 is simultaneously turned in the 5th transistor T5, the 6th transistor T6 and the 7th transistor T7 When (when the second LED control signal EM2 and reset signal RST are simultaneously open signal), first node N1 and light-emitting component LE Resetting voltage Vinit is accessed simultaneously, that is to say, that control terminal and hair that can simultaneously to storage capacitance Cs, the first transistor T1 Optical element carries out reset operation.
It, can be by the grid (first node N1) of the first transistor T1 and the second pole (second when third transistor T3 is connected Node N2) connection, the first transistor T1 is in diode connection type at this time, so as to which data-signal Vdata to be stored in Storage is held in Cs.Meanwhile the threshold voltage of the first transistor T1 (driving transistor) can also be compensated by own.
In addition, as shown in figure 3, third transistor T3 and the 6th transistor T6 are symmetrically disposed in the grid of the first transistor T1 Between pole and the second pole between grid and the first pole.Using this connection type, there are two polarity each other for first node N1 tool Opposite leakage path, Leakage Current may be implemented to mutually compensate, and so as to reduce Leakage Current when OFF state, improve and use The display effect of the display device of the pixel circuit.
It should be noted that the transistor used in embodiment of the disclosure all can be thin film transistor (TFT) or field-effect crystalline substance Body pipe or other characteristics identical switching device are illustrated in embodiment of the disclosure by taking thin film transistor (TFT) as an example.Here The source electrode of the transistor of use, drain electrode can be in structure it is symmetrical, so its source electrode, drain electrode can be in structure does not have Difference.In embodiment of the disclosure, it in order to distinguish the two poles of the earth of transistor in addition to grid, directly describes wherein one extremely First pole, another extremely the second pole.
In addition, transistor in embodiment of the disclosure is illustrated by taking P-type transistor as an example, at this point, the first pole It can be source electrode, the second pole can be drain electrode.It should be noted that the disclosure includes but is not limited to this, for example, the reality of the disclosure N-type transistor can also all be used by applying the transistor in example, at this point, the first pole can be drain electrode, the second pole can be source electrode；Again For example, the transistor in embodiment of the disclosure can be mixed using P-type transistor and N-type transistor, only need to select simultaneously The port polarity of the transistor of type is accordingly connected according to the port polarity of the respective transistor in embodiment of the disclosure.
Embodiment two
The present embodiment provides a kind of pixel circuits 10, as shown in figure 4, the pixel circuit and pixel circuit shown in Fig. 2 The difference is that the connection type of the second reset circuit 620, the second reset circuit 620 and the second emission control circuit here 500 and light-emitting component 700 connect, resetting voltage Vinit is applied to light-emitting component 700, and pass through the second light emitting control Resetting voltage Vinit is applied to compensation circuit 300 by circuit 500 and the first reset circuit 610.
For example, as shown in figure 4, when reset signal RST and the second LED control signal EM2 is simultaneously open signal, the One reset circuit 610, the second reset circuit 620 and the second emission control circuit 500 are opened simultaneously, and resetting voltage Vinit can To be applied to compensation circuit 300, the control terminal 130 of driving circuit 100 and light-emitting component 700 simultaneously, so as to right simultaneously They carry out reset operation.
It shines about driving circuit 100, switching circuit 200, compensation circuit 300, the first emission control circuit 400, second Control circuit 500, reset circuit 600 and light-emitting component 700 can be no longer superfluous here accordingly to describe in reference implementation example one It states.
For example, similar with embodiment one, pixel circuit 10 shown in Fig. 4 can be implemented as pixel shown in fig. 5 Circuit structure.As shown in figure 5, likewise, the pixel circuit 10 include: first to the 7th transistor T1, T2, T3, T4, T5, T6, T7, and including storage capacitance Cs and light-emitting component LE.The first transistor T1 is used as driving transistor, others second to the Seven transistors are used as switching transistor.
Pixel circuit 10 shown in Fig. 5 is with pixel circuit shown in Fig. 3 the difference is that the 7th transistor T7 Connection type, here the positive terminal of the first pole of the 7th transistor T7 and light-emitting component LE connection (i.e. with fourth node N4 connect It connects).For example, the negative pole end of light-emitting component LE is connect to receive second voltage Vss with second voltage end.Such as second voltage end can With ground connection, i.e. Vss can be 0V, such as the second voltage end is the common voltage terminal of display device, i.e., the picture of each sub-pixel Plain circuit uses identical second voltage end.
Other transistors and storage capacitance Cs shown in Fig. 5 can be accordingly to describe in reference implementation example one, this In repeat no more.
It should be noted that being to access second voltage Vss with the negative pole end of light-emitting component in embodiment of the disclosure It is illustrated for (low pressure), embodiment of the disclosure includes but is not limited to this, for example, it is also possible to make light-emitting component LE just Extreme access first voltage Vdd (high pressure) (such as common voltage terminal), and negative pole end is then directly or indirectly connected to driving electricity Road.
Embodiment three
The present embodiment provides a kind of driving methods of pixel circuit.Fig. 6, which is shown in the present embodiment, is applied to pixel circuit In signal timing diagram, below shown in Fig. 5 for pixel circuit, and Fig. 6 to Figure 10 is combined to carry out the driving method It is described in detail, but pixel circuit for example shown in Fig. 3 can use the same or similar signal sequence.
For example, as shown in fig. 6, driving method provided in this embodiment may include four-stage, respectively reseting stage 1, data write-in and compensated stage 2, charging and stage 3 and light emitting phase 4 are kept, is shown in Fig. 6 each in each stage The timing waveform of signal.
It should be noted that Fig. 7 is schematic diagram when pixel circuit shown in Fig. 5 is in reseting stage 1, Fig. 8 Fig. 5 Shown in pixel circuit be in data write-in and schematic diagram when compensated stage 2, Fig. 9 is at pixel circuit shown in Fig. 5 Schematic diagram when charging and keeping stage 3, Figure 10 are schematic diagram when pixel circuit shown in Fig. 5 is in light emitting phase 4. In addition Fig. 7 is indicated within the corresponding stage with the transistor of broken line representation in off state, Fig. 7 band into Figure 10 into Figure 10 The dotted line of arrow indicates current direction of the pixel circuit within the corresponding stage.Transistor shown in Fig. 7 to Figure 10 is with p-type crystalline substance For body pipe, i.e., the grid of each transistor is connected when accessing low level, and ends when accessing high level.Following embodiment It is identical with this, repeats no more.
In reseting stage 1, input reset signal RST and the second LED control signal EM2, open the first reset circuit 610, Second reset circuit 620 and the second emission control circuit 500, to compensation circuit 300, driving circuit 100 and light-emitting component 700 into Row resets.
As shown in Figure 6 and Figure 7, in reseting stage 1, the 6th transistor T6 and the 7th transistor T7 are reset signal RST's Low level conducting, the 5th transistor T5 are connected by the low level of the second LED control signal EM2；Meanwhile second transistor T2 and Third transistor T3 is scanned the high level cut-off of signal Scan, and the 4th transistor T4 is by the height of the first LED control signal EM1 Level cut-off.
As shown in fig. 7, a reset path (as shown in dotted line with the arrow in Fig. 7) is formed in reseting stage 1, due to Resetting voltage Vinit is low level signal (such as can be grounded or be other low level signals), and storage capacitance Cs passes through reset Path electric discharge, so that the current potential of first node N1, third node N3 and fourth node N4 be resetted simultaneously.
In reseting stage 1, storage capacitance Cs is reset, and makes the tension discharge being stored in storage capacitance Cs, thus after making Data-signal in the continuous stage can more rapidly, be more reliably stored in storage capacitance Cs；Meanwhile fourth node N4 also by It resets, i.e., resets OLED, so as to improve using above-mentioned so that OLED is shown as black state before light emitting phase 4 does not shine The display effects such as the contrast of the display device of pixel circuit.
In data write-in and compensated stage 2, scanning signal Scan and data-signal Vdata is inputted, opens switching circuit 200, driving circuit 100 and compensation circuit 300, for switching circuit 200 by data-signal Vdata write driver circuit 100, compensation is electric Road 300 compensates driving circuit 100.
As shown in Figure 6 and Figure 8, in data write-in and compensated stage 2, second transistor T2 and third transistor T3 are scanned The low level of signal Scan is connected.At this point, the first transistor T1 is in diode connection side due to the conducting of third transistor T3 Formula；Meanwhile the 4th transistor T4 ended by the high level of the first LED control signal EM1, the 5th transistor T5 shone by second Control the high level cut-off of signal EM2, the 6th transistor T6 and the 7th transistor T7 are reset the high level cut-off of signal RST.
As shown in figure 8, it is (with the arrow in such as Fig. 8 to form a data write paths in data write-in and compensated stage 2 Shown in dotted line), data-signal Vdata is after second transistor T2, the first transistor T1 and third transistor T3 to first segment Point N1 is charged and (is charged to storage capacitance Cs), that is to say, that the current potential of first node N1 becomes larger.It is readily appreciated that, third section The current potential of point N3 remains Vdata, while according to the self-characteristic of the first transistor T1, when the current potential of first node N1 increases to When Vdata+Vth, the first transistor T1 cut-off, charging process terminates.It should be noted that Vth indicates the threshold of the first transistor Threshold voltage, since in the disclosure, the first transistor T1 is just illustrated by taking P-type transistor as an example, so threshold value electricity herein Pressure Vth can be a negative value.
After data write-in and compensated stage 2, the current potential of first node N1 and second node N2 are Vdata+Vth, That is the information of voltage with data-signal Vdata and threshold voltage vt h has been stored in storage capacitance Cs, to be used for It is subsequent in light emitting phase, gray scale be provided show and data and the threshold voltage of the first transistor T1 itself is compensated.
It is charging and is being kept for the stage 3, inputting the first LED control signal EM1, opening the first emission control circuit 400 and drive First voltage Vdd is applied to driving circuit 100 and keeps driving circuit 100 by dynamic circuit 100, the first emission control circuit 400 Control terminal 130 voltage.
As shown in Fig. 6 and Fig. 9, is charging and kept for the stage 3, the 4th transistor T4 is by the first LED control signal EM1's Low level conducting.Second transistor T2 and third transistor T3 is scanned the high level cut-off of signal Scan, the 5th transistor T5 Ended by the high level of the second LED control signal EM2, the 6th transistor T6 and the 7th transistor T7 are reset the height of signal RST Level cut-off.
As shown in figure 9, charging and being kept for stage 3, since third transistor T3 and the 6th transistor T6 are turned off, first Node N1 does not have discharge path, so the current potential of first node N1 keeps current potential, that is, Vdata+Vth on last stage.Due to first Transistor T1 and the 4th transistor T4 conducting, forms a charge path (as shown in dotted line with the arrow in Fig. 9), thus by the The current potential of two node N2 and third node N3 charge to first voltage Vdd.
In light emitting phase 4, the first LED control signal EM1 and the second LED control signal EM2 is inputted, first is opened and shines Control circuit 400, the second emission control circuit 500 and driving circuit 100, the second emission control circuit 500 apply driving current Light-emitting component 700 is added to so that it shines.
As shown in figs. 6 and 10, signal Scan is scanned in light emitting phase 4, second transistor T2 and third transistor T3 High level cut-off, the 6th transistor T6 and the 7th transistor T7 are reset the high level cut-off of signal RST.4th transistor T4 It is connected by the low level of the first LED control signal EM1, the 5th transistor T5 is led by the low level of the second LED control signal EM2 It is logical, while the first transistor T1 is also tended to remain in this stage.
As shown in Figure 10, in light emitting phase 4, a driving light emitting path is formed (such as dotted line institute with the arrow in Figure 10 Show).The positive terminal and negative pole end of light-emitting component LE has been respectively connected to first voltage Vdd (high pressure) and second voltage Vss (low pressure), To shine under the action of flowing through the driving current of the first transistor T1.The current potential of first node N1 keeps electricity on last stage Position Vdata+Vth, the current potential of third node N3 also keep current potential Vdd on last stage.
Specifically, the driving current I of light-emitting component LE is flowed throughLEValue can be obtained according to following formula:
ILE=K (Vgs-Vth)2
=K [(Vdata+Vth-Vdd)-Vth]2
=K (Vdata-Vdd)2
In above-mentioned formula, Vth indicates that the threshold voltage of the first transistor T1, Vgs indicate the grid of the first transistor T1 And the first voltage between such as source electrode of pole, K are a constant value.As can be seen from the above formula that flowing through the drive of light-emitting component LE Streaming current ILEIt is no longer related with the threshold voltage vt h of the first transistor T1, and the only gray scale luminous with the pixel circuit is controlled Data-signal Vdata is related, it is possible thereby to realize the compensation to the pixel circuit, solves driving transistor (in the disclosure The problem of causing threshold voltage shift is operated due to manufacturing process and for a long time for the first transistor T1) in embodiment, is eliminated It is to driving current ILEInfluence, so as to improve display effect.
It should be noted that for the driving method in the driving method and the present embodiment of pixel circuit shown in Fig. 3 Similar, which is not described herein again.
Example IV
The present embodiment provides a kind of display devices 1, and as shown in figure 11, which includes: in the multiple of array distribution Pixel unit 60, multi-strip scanning signal wire, a plurality of data signal line and a plurality of reset control line.It should be noted that in Figure 11 In illustrate only the pixel unit 60 of part, scan signal line, data signal line and reset control line.For example, SNIndicate Nth row Scan signal line, SN+1Indicate the scan signal line of N+1 row；RNIndicate the reset control line of Nth row, RN+1Indicate N+1 Capable reset control line；DMIndicate the data signal line of m column, DM+1Indicate the data signal line of M+1 column.Here, N with M For example it is greater than 0 integer.
For example, each pixel unit 60 may include any pixel circuit 10 provided in above-described embodiment, for example including Pixel circuit 10 shown in Fig. 5.
For example, the switching circuit 200 and compensation circuit 300 in the scan signal line of every a line and the pixel circuit of current row connect It connects to provide scanning signal Scan；Switching circuit 200 in the data signal line and Ben Lie pixel circuit of each column is connected to mention For data-signal Vdata；Reset circuit 600 in the reset control line and current row pixel circuit of every a line is connected to provide reset Signal RST (not shown).
For example, in situation of the pixel circuit 10 including the first emission control circuit 400 and the second emission control circuit 500 Under, display device 1 can also include a plurality of light emitting control line.The light emitting control line E of Nth row is illustrated only in Figure 11NWith N+1 Capable light emitting control line EN+1。
As shown in figure 11, the light emitting control of the first emission control circuit 400 and Nth row in the pixel circuit 10 of Nth row Line ENConnection；The light emitting control line E of the second emission control circuit 500 and N+1 row in the pixel circuit 10 of Nth rowN+1Even It connects；The light emitting control line E of the first emission control circuit 400 and N+1 row in the pixel circuit 10 of N+1 rowN+1Connection.With This analogizes, that is to say, that the pixel circuit 10 of the second emission control circuit 500 and N+1 row in the pixel circuit 10 of Nth row In the first emission control circuit 400 share N+1 row light emitting control line EN+1。
It should be noted that display device 1 shown in Figure 11 can also include a plurality of first voltage line and a plurality of reset electricity Crimping to provide first voltage Vdd and resetting voltage Vinit (not shown) respectively.
For example, as shown in figure 11, which can also include scan drive circuit 20 and data drive circuit 30.
For example, data drive circuit 30 can be with a plurality of data signal line (DM、DM+1Deng) connection, to provide data-signal Vdata；It can also be connect simultaneously with a plurality of first voltage line (not shown) and a plurality of reset voltage line (not shown) To provide first voltage Vdd and resetting voltage Vinit respectively.
For example, scan drive circuit 20 can be with multi-strip scanning signal wire (SN、SN+1Deng) connection, to provide scanning signal Scan；It simultaneously can also be with a plurality of light emitting control line (EN、EN+1Deng) connection to provide LED control signal, and with it is a plurality of multiple Position control line (RN、RN+1Deng) connect to provide reset signal.
For example, scan drive circuit 20 and data drive circuit 30 can be implemented as semiconductor chip.The display device 1 is also It may include other component, such as sequence controller, signal decoding circuit, voltage conversion circuit etc., these components for example can be with Using existing conventional components, I will not elaborate.
It is described below with reference to progressive scan process of the driving method in embodiment three to the display device 1, this reality Applying each stage in example can refer to and accordingly describe in embodiment three.
For example, the pixel circuit of Nth row after reseting stage, receive the progressive-scan signal on scan signal line and Into data write-in and compensated stage.In this stage, by the pixel electricity of data-signal Vdata and threshold voltage vt h write-in Nth row Road, in subsequent light emitting phase, providing corresponding gray scale display data and being compensated to threshold voltage.It is easy reason Solution, since control signal such as reset signal is applied line by line according to clock signal, so the pixel circuit of N+1 row at this time In reseting stage.
The pixel circuit of Nth row is charged and is kept for the stage entering after data write-in and compensated stage, in this stage, The light emitting control line E of the first emission control circuit 400 access Nth row in the pixel circuit of Nth rowNThe open signal of offer and Conducting；The light emitting control line E of the second emission control circuit 500 access N+1 row in the pixel circuit of Nth rowN+1The pass of offer Close signal and by.At this point, the pixel circuit of N+1 row is in data write-in and compensated stage, by corresponding data-signal The pixel circuit of Vdata and threshold voltage vt h write-in N+1 row.
The pixel circuit of Nth row is entering through overcharge and after the holding stage light emitting phase, in the pixel circuit of Nth row The light emitting control line E of first emission control circuit 400 access Nth rowNThe open signal of offer and be connected；The pixel electricity of Nth row The light emitting control line E of the second emission control circuit 500 access N+1 row in roadN+1The open signal of offer and be connected, thus The pixel circuit of Nth row realizes luminescence display.Meanwhile the light emitting control line E of N+1 rowN+1The open signal of offer also accesses The first emission control circuit 400 in the pixel circuit of N+1 row, so that the pixel circuit of N+1 row is in charging and keeps Stage.It is readily appreciated that, at this time the luminous control of the second emission control circuit 500 access N+2 row in the pixel circuit of N+1 row Shutdown signal that line processed provides and by.In subsequent time, luminescence display is can be realized in the pixel circuit of N+1 row, successively class It pushes away, to realize progressive scan display.
In display device 1 provided in this embodiment, the pixel circuit of pixel circuit and N+1 row due to Nth row can To share a light emitting control line, so as to so that layout exploitation becomes simple.It can be with reference to this about other technical effects The technical effect of the pixel circuit provided in disclosed embodiment, which is not described herein again.
For example, display device 1 provided in this embodiment can for Electronic Paper, mobile phone, tablet computer, television set, display, Any products or components having a display function such as laptop, Digital Frame, navigator.
The above, the only specific embodiment of the disclosure, but the protection scope of the disclosure is not limited thereto, this public affairs The protection scope opened should be based on the protection scope of the described claims.

Claims (19)

1. a kind of pixel circuit, comprising: switching circuit, driving circuit, compensation circuit, reset circuit and light-emitting component；Wherein,
The driving circuit includes control terminal, first end and second end, and is configured to control and flows through the first end and described the The driving current for driving the light-emitting component luminous at two ends；
The switching circuit is configured to that data-signal is written to the control terminal of the driving circuit in response to scanning signal；
The compensation circuit is configured to the data-signal of storage write-in, and in response to the scanning signal that the driving is electric The control terminal and second end on road are electrically connected；
The reset circuit is configured to that resetting voltage is applied to the compensation circuit in response to reset signal, and by the driving The control terminal and first end of circuit are electrically connected.
2. pixel circuit according to claim 1, further includes: the first emission control circuit is configured in response to the first hair First voltage is applied to the second end and the compensation circuit of the driving circuit by optical control signal.
3. pixel circuit according to claim 2, further includes: the second emission control circuit is configured in response to the second hair The driving current is applied to the light-emitting component by optical control signal, wherein
Second LED control signal is different from first LED control signal.
4. pixel circuit according to claim 1 to 3, wherein
The reset circuit includes the first reset circuit and the second reset circuit, and first reset circuit is in response to the reset The control terminal of the driving circuit and first end are electrically connected by signal, and second reset circuit will in response to the reset signal The resetting voltage is applied to the compensation circuit.
5. pixel circuit according to claim 4, wherein
Second reset circuit is connect with the control terminal of the driving circuit and the compensation circuit, by the reset electricity Pressure is applied to the control terminal and the compensation circuit of the driving circuit.
6. pixel circuit according to claim 4, wherein
Second reset circuit is connect with second emission control circuit and the light-emitting component, by the reset electricity Pressure is applied to the light-emitting component, and the resetting voltage is applied to the compensation circuit by first reset circuit.
7. pixel circuit according to claim 4, wherein the driving circuit includes the first transistor,
The grid of the first transistor is connected as the control terminal of the driving circuit with first node, the first transistor The first pole connected as the first end of the driving circuit with third node, described in the second pole of the first transistor is used as The second end of driving circuit is connected with second node.
8. pixel circuit according to claim 7, wherein the switching circuit includes second transistor,
The gate configuration of the second transistor is to be connected with scanning signal end to receive the scanning signal, second crystal First pole of pipe is configured to be connected with data signal end to receive the data-signal, the second pole of the second transistor and institute State the connection of third node.
9. pixel circuit according to claim 7, wherein the compensation circuit includes third transistor and storage capacitance,
The gate configuration of the third transistor is to be connected with scanning signal end to receive the scanning signal, the third crystal First pole of pipe is connected with the second node, and the second pole of the second transistor and the first pole of the storage capacitance connect It connects, the second pole of the storage capacitance is configured to connect with first voltage end to receive first voltage.
10. pixel circuit according to claim 7, wherein first emission control circuit includes the 4th transistor,
The gate configuration of 4th transistor is to be connected with the first light emitting control end to receive first LED control signal, First pole of the 4th transistor is configured to connect with first voltage end to receive first voltage, and the of the 4th transistor Two poles are connected with the second node.
11. pixel circuit according to claim 7, wherein second emission control circuit includes the 5th transistor,
The gate configuration of 5th transistor is to be connected with the second light emitting control end to receive second LED control signal, First pole of the 5th transistor is connected with the third node, the second pole of the 5th transistor and the light-emitting component The first pole connection, the second pole of the light-emitting component is configured to connect with second voltage end to receive second voltage.
12. pixel circuit according to claim 7, wherein first reset circuit includes the 6th transistor,
The gate configuration of 6th transistor is to be connected with reseting controling end to receive the reset signal, the 6th crystal First pole of pipe is connected with the first node, and the second pole of the 6th transistor is connected with the third node.
13. pixel circuit according to claim 7, wherein second reset circuit includes the 7th transistor,
The gate configuration of 7th transistor is to be connected with reseting controling end to receive the reset signal, the 7th crystal First pole of pipe is connected with the first node, and the second pole of the 7th transistor is configured to connect with resetting voltage end to connect Receive the resetting voltage.
14. pixel circuit according to claim 7, wherein second reset circuit includes the 7th transistor,
The gate configuration of 7th transistor is to be connected with reseting controling end to receive the reset signal, the 7th crystal First pole of pipe is connected with the first pole of the light-emitting component, and the second pole of the 7th transistor is configured to and resetting voltage end Connection is to receive the resetting voltage.
15. pixel circuit according to claim 3, wherein second LED control signal and the reset signal are extremely It less while being open signal.
16. a kind of display device, comprising: in multiple pixel units of array distribution, multi-strip scanning signal wire, a plurality of data-signal Line and a plurality of reset control line；Wherein,
Each pixel unit includes pixel circuit as described in claim 1；
The scan signal line of every a line is connected with the switching circuit in the pixel circuit of current row with compensation circuit to provide described sweep Retouch signal；
The data signal line of each column is connected with the switching circuit in Ben Lie pixel circuit to provide the data-signal；
The reset control line of every a line is connected with the reset circuit in current row pixel circuit to provide the reset signal.
17. display device according to claim 16 further includes a plurality of light emitting control line, wherein
The pixel circuit further include: the first emission control circuit is configured to electric by first in response to the first LED control signal Pressure is applied to the second end and the compensation circuit of the driving circuit；Second emission control circuit is configured in response to The driving current is applied to the light-emitting component by two LED control signals, wherein second LED control signal is different In first LED control signal；
The first emission control circuit in the pixel circuit of Nth row is connected with the light emitting control line of Nth row；
The light emitting control line of the second emission control circuit and N+1 row in the pixel circuit of Nth row connects；
The light emitting control line of the first emission control circuit and N+1 row in the pixel circuit of N+1 row connects；
N is the integer greater than zero.
18. a kind of driving method of pixel circuit described in claim 1, comprising: reseting stage, data write-in and compensated stage And light emitting phase；Wherein,
In reseting stage, the reset signal is inputted, opens the reset circuit, to the compensation circuit and the driving circuit It is resetted；
In data write-in and compensated stage, the scanning signal and the data-signal are inputted, opens the switching circuit, described The driving circuit, the compensation electricity is written in the data-signal by driving circuit and the compensation circuit, the switching circuit Road compensates the driving circuit；And
In light emitting phase, the driving circuit drives the light-emitting component so that it shines.
19. a kind of driving method of pixel circuit as claimed in claim 4, comprising: reseting stage, data write-in and compensation rank Section, charging and holding stage, light emitting phase；Wherein,
In reseting stage, the reset signal and second LED control signal are inputted, opens first reset circuit, institute The second reset circuit and second emission control circuit are stated, to the compensation circuit, the driving circuit and the luminous member Part is resetted；
In data write-in and compensated stage, the scanning signal and the data-signal are inputted, opens the switching circuit, described The driving circuit, the compensation electricity is written in the data-signal by driving circuit and the compensation circuit, the switching circuit Road compensates the driving circuit；
It is charging and is being kept for the stage, inputting first LED control signal, opening first emission control circuit and described The first voltage is applied to the driving circuit and keeps the driving electricity by driving circuit, first emission control circuit The voltage of road control terminal；And
In light emitting phase, first LED control signal and second LED control signal are inputted, opens first hair Light control circuit, the second emission control circuit and the driving circuit, second emission control circuit is by the driving current The light-emitting component is applied to so that it shines.
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Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109887466A (en) * 2019-04-19 2019-06-14 京东方科技集团股份有限公司 Pixel-driving circuit and method, display panel
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CN110634432A (en) * 2019-10-25 2019-12-31 京东方科技集团股份有限公司 OLED pixel circuit, driving method, aging detection method and display panel
CN110634440A (en) * 2019-08-27 2019-12-31 武汉华星光电半导体显示技术有限公司 Pixel compensation circuit
CN111063297A (en) * 2020-02-22 2020-04-24 禹创半导体(广州)有限公司 Miniature micro LED display device
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CN112309334A (en) * 2019-08-01 2021-02-02 北京小米移动软件有限公司 Pixel driving circuit and method, display device
KR20210011554A (en) * 2019-07-22 2021-02-02 삼성디스플레이 주식회사 Pixel and display device having the same
CN112424856A (en) * 2019-06-03 2021-02-26 京东方科技集团股份有限公司 Pixel circuit, driving method of pixel circuit, display device and driving method of display device
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US11380261B2 (en) * 2019-01-24 2022-07-05 Ordos Yuansheng Optoelectronics Co., Ltd. Pixel circuit, pixel driving method and display device
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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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US11862091B1 (en) * 2023-01-09 2024-01-02 Novatek Microelectronics Corp. Pixel circuit of display panel

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102222468A (en) * 2011-06-23 2011-10-19 华南理工大学 Alternating-current pixel driving circuit and method for active organic light-emitting diode (OLED) display
CN103137067A (en) * 2011-12-05 2013-06-05 乐金显示有限公司 Organic light emitting diode display device and method of driving the same
CN103150991A (en) * 2013-03-14 2013-06-12 友达光电股份有限公司 Pixel compensation circuit for AMOLED (Active Matrix/Organic Light Emitting Diode) displayer
CN104282266A (en) * 2014-08-26 2015-01-14 苹果公司 Organic light-emitting diode display with reduced capacitance sensitivity
CN104575377A (en) * 2014-12-22 2015-04-29 昆山国显光电有限公司 Pixel circuit and driving method thereof as well as active matrix organic light emitting display
CN105590955A (en) * 2015-12-25 2016-05-18 昆山国显光电有限公司 Pixel circuit and driving method thereof, and active matrix organic light emitting display
CN205541822U (en) * 2016-04-06 2016-08-31 京东方科技集团股份有限公司 Pixel circuit , array substrate , display panel and display device
CN106663407A (en) * 2014-07-04 2017-05-10 乐金显示有限公司 Oled display device
CN106683619A (en) * 2017-03-28 2017-05-17 京东方科技集团股份有限公司 Pixel driving circuit, pixel driving method and display device

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100560780B1 (en) 2003-07-07 2006-03-13 삼성에스디아이 주식회사 Pixel circuit in OLED and Method for fabricating the same
KR100592641B1 (en) 2004-07-28 2006-06-26 삼성에스디아이 주식회사 Pixel circuit and organic light emitting display using the same
TWI459352B (en) * 2012-06-13 2014-11-01 Innocom Tech Shenzhen Co Ltd Displays
TWI476744B (en) * 2012-10-25 2015-03-11 Innocom Tech Shenzhen Co Ltd Amoled pixel driving circuit and its method
KR101549900B1 (en) 2014-01-28 2015-09-03 호서대학교 산학협력단 Pixel circuit of organic light emitting display
KR102320311B1 (en) * 2014-12-02 2021-11-02 삼성디스플레이 주식회사 Organic light emitting display and driving method of the same
CN104465715B (en) * 2014-12-30 2017-11-07 上海天马有机发光显示技术有限公司 Image element circuit, driving method, display panel and display device
CN107342044B (en) * 2017-08-15 2020-03-03 上海天马有机发光显示技术有限公司 Pixel circuit, display panel and driving method of pixel circuit

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102222468A (en) * 2011-06-23 2011-10-19 华南理工大学 Alternating-current pixel driving circuit and method for active organic light-emitting diode (OLED) display
CN103137067A (en) * 2011-12-05 2013-06-05 乐金显示有限公司 Organic light emitting diode display device and method of driving the same
CN103150991A (en) * 2013-03-14 2013-06-12 友达光电股份有限公司 Pixel compensation circuit for AMOLED (Active Matrix/Organic Light Emitting Diode) displayer
CN106663407A (en) * 2014-07-04 2017-05-10 乐金显示有限公司 Oled display device
CN104282266A (en) * 2014-08-26 2015-01-14 苹果公司 Organic light-emitting diode display with reduced capacitance sensitivity
CN104575377A (en) * 2014-12-22 2015-04-29 昆山国显光电有限公司 Pixel circuit and driving method thereof as well as active matrix organic light emitting display
CN105590955A (en) * 2015-12-25 2016-05-18 昆山国显光电有限公司 Pixel circuit and driving method thereof, and active matrix organic light emitting display
CN205541822U (en) * 2016-04-06 2016-08-31 京东方科技集团股份有限公司 Pixel circuit , array substrate , display panel and display device
CN106683619A (en) * 2017-03-28 2017-05-17 京东方科技集团股份有限公司 Pixel driving circuit, pixel driving method and display device

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110097851A (en) * 2018-01-30 2019-08-06 三星显示有限公司 Pixel and organic light-emitting display device including pixel
US11380261B2 (en) * 2019-01-24 2022-07-05 Ordos Yuansheng Optoelectronics Co., Ltd. Pixel circuit, pixel driving method and display device
CN109887466A (en) * 2019-04-19 2019-06-14 京东方科技集团股份有限公司 Pixel-driving circuit and method, display panel
CN110264946A (en) * 2019-05-21 2019-09-20 合肥维信诺科技有限公司 A kind of pixel circuit and display device
US11436978B2 (en) 2019-05-21 2022-09-06 Hefei Visionox Technology Co., Ltd. Pixel circuit and display device
CN112424856A (en) * 2019-06-03 2021-02-26 京东方科技集团股份有限公司 Pixel circuit, driving method of pixel circuit, display device and driving method of display device
CN110246459A (en) * 2019-06-20 2019-09-17 京东方科技集团股份有限公司 Pixel circuit and its driving method, display panel and display device
CN113366562A (en) * 2019-07-12 2021-09-07 深圳市柔宇科技股份有限公司 Pixel unit, array substrate and display terminal
KR102591507B1 (en) 2019-07-22 2023-10-23 삼성디스플레이 주식회사 Pixel and display device having the same
KR20210011554A (en) * 2019-07-22 2021-02-02 삼성디스플레이 주식회사 Pixel and display device having the same
KR102657133B1 (en) * 2019-07-22 2024-04-16 삼성디스플레이 주식회사 Pixel and display device having the same
CN112309334A (en) * 2019-08-01 2021-02-02 北京小米移动软件有限公司 Pixel driving circuit and method, display device
CN112309334B (en) * 2019-08-01 2022-03-01 北京小米移动软件有限公司 Pixel driving circuit and method, display device
CN110634440B (en) * 2019-08-27 2021-06-01 武汉华星光电半导体显示技术有限公司 Pixel compensation circuit
CN110634440A (en) * 2019-08-27 2019-12-31 武汉华星光电半导体显示技术有限公司 Pixel compensation circuit
CN110634432B (en) * 2019-10-25 2023-05-12 京东方科技集团股份有限公司 OLED pixel circuit, driving method, aging detection method and display panel
CN110634432A (en) * 2019-10-25 2019-12-31 京东方科技集团股份有限公司 OLED pixel circuit, driving method, aging detection method and display panel
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CN113838420B (en) * 2021-08-05 2022-03-18 京东方科技集团股份有限公司 Pixel circuit, display device and driving method
CN113838420A (en) * 2021-08-05 2021-12-24 京东方科技集团股份有限公司 Pixel circuit, display device and driving method
CN114283744A (en) * 2021-12-30 2022-04-05 重庆惠科金渝光电科技有限公司 Driving method of display unit, display panel and display device
WO2023178663A1 (en) * 2022-03-25 2023-09-28 京东方科技集团股份有限公司 Pixel circuit, pixel driving method, and display device
CN114783370A (en) * 2022-05-05 2022-07-22 武汉天马微电子有限公司 Pixel circuit, display panel and display device
CN114783370B (en) * 2022-05-05 2023-10-20 武汉天马微电子有限公司 Pixel circuit, display panel and display device
CN116312361A (en) * 2023-02-27 2023-06-23 惠科股份有限公司 Display driving circuit, display driving method and display panel

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